Acta Cryst. (2006). E62, o2242-o2244  [ doi:10.1107/S1600536806013572 ]

2,2'-(Piperazine-1,4-diium-1,4-diyl)diacetate dihydrate

L. Shen, F.-W. Wang, A.-B. Cheng and S. Yang

Abstract: The asymmetric unit of the title compound, C₈H₁₄N₂O₄·2H₂O, contains one water molecule and one half-molecule of piperazine-1,4-diacetic acid in salt form. Intramolecular N-HO and O-HO and intermolecular O-HO hydrogen bonds are involved in the crystal packing. In the centrosymmetric title compound, the six-membered piperazine ring is in a standard chair form, and the two acetates are mutually trans. The 2,2'-(piperazine-1,4-diyl)diacetic acid and water molecules are connected through a complex pattern of hydrogen-bonding interactions, resulting in a three-dimensional network.

Online 10 May 2006

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